• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2002년도 춘계학술발표대회 개요집
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• pp.59-61
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• 2002

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2006년도 춘계 학술대회 개요집
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• pp.251-253
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• 2006

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2007년 추계학술발표대회 개요집
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• pp.109-112
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• 2007

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2007년 추계학술발표대회 개요집
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• pp.33-35
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• 2007

• Journal of Welding and Joining
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• 제11권3호
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• pp.22-33
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• 1993

Arc sensor is indispensable to arc welding robot systems for compensating the joint misalignment such as mismatch of the workpiece, ill-conditioned positioner and thermal deformation during welding. Furthermore, the amount of these mismatches cannot be preivously expected, and changes from time to time. There are many kinds of seam trackers for correcting the welding path of the robot, where non-contact type sensors arc prevalently used in arc welding robot systems. In this study, an arc sensor was developed for GMA and FCA welding robot system. Since the arc sensor uses the arc characteristics during welding, the operating principle of the arc sensor must be adjusted according to the welding condition. Especially in GMA welding with the $CO_{2}$ shielding gas, the welding arc is not stable because of the short circuit and non-axial globular transfer mode of the molten droplet. In this study, the 2nd order least square curve fitting algorithm was adopted and the applicability of this algorithm was investigated for robot welding systems. For easy usage of the arc sensor, the operating parameters for arc sensor were limited to eight which can be easily determined by the operator.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2004년도 춘계 학술발표대회 개요집
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• pp.92-94
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• 2004

선박 건조 시 적용되는 여러 가지 용접기법 중 가장 많이 적용되는 기법 중 하나가 FCA용접 (Flux Cored Arc Welding)이다. 일반적으로 100% $CO_2$ 가스를 사용하고, 플럭스 코어드 와이어를 사용하여 자동 또는 반자동 용접에 적용한다. (중략)

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2005년도 춘계학술발표대회 개요집
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• pp.69-70
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• 2005

In order to prevent the arc blow at the FCA welding system with multi-torches, the effects of arc length on the magnetic flux at the FCA weldment was evaluated using electro-magnetic filed analysis. Magnetic flux density around arc are slightly increased with an increase in the arc length. Based on the FEA results, the minimum distance of torches to control arc blow was established.

• 한국강구조학회 논문집
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• 제18권5호
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• pp.665-675
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• 2006

건출물이 고층화되고 장스팬화될 수록 고강도이면서 신뢰성이 우수한 강재의 사용요구가 증대된다. 이러한 이유로 개발된 강재가 SM570TMC 강재이다. 그러나 아직까지는 SM570TMC 강재는 우수한 기계적 성질에도 불구하고, 동급의 타 강재보다 우수하다고 하는 용접성이 검증되지 않은 상태이다. 본 연구에서는 현장 작업조건으로 국산 용접재료 2종류와 일본산 용접재료 1종류에 대해서 SA 및 FCA 용접하여 용접성을 평가하였다.

• Journal of Welding and Joining
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• 제28권1호
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• pp.86-91
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• 2010

In the present study, two-dimensional plane deformation thermo elasto-plastic analysis has been carried out, in order to investigate the thermal and mechanical behaviour (residual stress, plastic strain, magnitude of stress and their distribution and production mechanism) on multi-pass FCA butt weldment of high strength EH36-TMCP ultra thick plate. Moreover, this study can be considered as a basis for analysing the fracture toughness, KIC, and its effect on welding residual stress redistribution with notch on multi-pass FCA butt weldment, in future. The results of welding residual stress obtained from thermo elasto-plastic analysis has been compared and verified with the results measured by XRD.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2005년도 춘계학술발표대회 개요집
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• pp.132-133
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• 2005